[[caption-width-right:215:Remind us again why [[AlienInvasion this]] is bad.]]

''Species'' is a 1995 SciFiHorror film directed by Creator/RogerDonaldson, and starring Creator/NatashaHenstridge, Creator/BenKingsley, Creator/MichaelMadsen, Creator/ForestWhitaker, Creator/AlfredMolina and Marg Helgenberger.

For thirty years, SETI has been scanning outer space, looking for signs of alien intelligence. In 1974, scientists sent out a message containing human DNA and the location of our planet. In return, they received two messages: one contains a catalyst for methane that allows the creation of cheap and efficient fuel, and the other contains a sample of alien DNA and instructions for how to combine it with human DNA. It is not long at all before scientists follow the instructions, creating the female human/alien hybrid Sil. She matures quickly, resembling an 11-year-old-girl after only a few weeks. She is intelligent, strong and agile - but the head of the research team thinks she might be dangerous to humanity and tries to terminate the experiment. Big mistake. Sil breaks out of her little habitat and escapes into Los Angeles, where she matures fully with two things in mind: survival at any cost, and reproduction with a human male.

It was followed by three sequels: ''Film/SpeciesII'' (1998), the only one theatrically released, bringing back Henstridge, Madsen and Helgenberger; ''Species III'' (2004), released direct-to-DVD and featuring a cameo by Henstridge; and ''Species - The Awakening'' (2007), which actually debuted on the [[Creator/SyFy Sci-Fi Channel]] one more before its home video release.

!!This film series provides examples of following tropes:
%% Zero Context Examples have been commented out. Please write up a full example before uncommenting.

[[folder:Series Wide]]

* AlienHair: In her full-alien form, Sil's hair resembles Franchise/{{Predator}} dreadlocks.
* AlienInvasion: Via reproduction with humans. The method of gestation in the second movie is particularly violent.
* ArtMajorBiology: The hybrids are a major example, particularly in the sequels (also see the below entry). The first film could handwave it as ignorance of the aliens' nature.
* BizarreAlienBiology:
** When their true nature is not manifesting, the alien beings still display such traits as the ability to regenerate body parts (including heads) within seconds. Losing and regrowing a head does not affect their memory.
** Despite apparently conceiving their children in their pubic region (Sil gets [[spoiler:Arden]] to ''feel'' their child growing, in her belly, [[spoiler:just before she kills him]]), the aliens birth their children through a concealed orifice on their chest cavity. No doubt a callback to Creator/HRGiger's previous [[Franchise/{{Alien}} iconic creation]].
** Breasts seem to be solely for [[FanService our enjoyment]] ([[AllMenArePerverts thank you, oh mighty alien overlord Xenu!]]), or more specifically, to make the aliens more attractive to human mates, as their offspring move immediately on to a solid-food diet (not requiring breastmilk), and in alien-form the nipples are tentacle weapons, not glands. Though, given the length of the tentacles, the breasts could just be there to hold the spooled tentacles when they're not in use.
** Once the professor "harvests" Sara's egg cells, she is rendered infertile. Which means that just like human women, her stockpile of reproductive cells is created exclusively in gestation (as opposed to men, who generate new supplies of sperm every time they get lucky). This is unusual, considering the aliens can "grow back" most other body parts as needed (like fingers), which we can't. [[note]]Which was the widely held belief at the time; we now know that human women can regenerate egg cells, albeit at a very slow rate that peters out over time.[[/note]]
%% * BloodyMurder
* BodyHorror: Bodily transformation sequences are depicted very graphically, like when Young Sil starts to transform into an alien monster in the first film.
* CombatTentacles: Which seem to be prehensible, to boot. The female aliens have two of those in their nipples, and their tongues serve as another.
* ConceiveAndKill: Naturally, this is the standard MO of the aliens.
* CreepyChild: [[spoiler: Sil's son in the original movie]] and the infected astronaut's numerous offspring in ''Species II''.
* CuteMonsterGirl: While the human forms of the hybrids are overall pretty hot, but even their alien forms are fairly appealing, with recognizable secondary sexual characteristics that are designed to appeal to potential human mates. The designers specifically wanted Sil to be beautiful even as an alien.
* {{Determinator}}: Do not get between the hybrids and their desired booty. They will kill you.
* ExpandedUniverse:
** Creator/DarkHorseComics had a four-issue comic miniseries entitled ''Species: Human Race'' while Creator/AvatarPress had the one-shot ''Species Special''.
** The {{novelization}}s also give a lot of backstory.
** There's a ''Species'' sourcebook for West End Games' Masterbook system.
* ExpressDelivery: It is natural for alien hybrids to mature inhumanly fast. In the second film, they do it so quickly, they quite literally go out with a bang.
* FaceFullOfAlienWingWong: The infected astronaut in the second film plays it straight, but the original is actually an ''inverted'' example, as the alien wants a face full of ''human'' wing-wong. The second film double-subverts it, with an alien who wants it from the other alien.
* FanDisservice: Okay, imagine you're in bed with a hot specimen of your preferred gender. Now imagine that it senses danger and starts turning into a green, armored, clawed scaly thing...
* FanService: The series is fueled on sex...
* {{Gorn}}: ...and blood.
* HalfHumanHybrid: The various alien menaces.
* ImpaledWithExtremePrejudice: The aliens have plenty of prehensile parts to impale their victims.
* MaleToFemaleUniversalAdaptor: The alien beings are HalfHumanHybrid shapeshifters. We don't know what their "equipment" [[OneWingedAngel really]] looks like, although they do seem to have a prominent tentacle motif going...
* NoOntologicalInertia: The aliens tend to turn back to human from their [[OneWingedAngel true form]] when they die. Doesn't happen in the first film, but does in the sequels.
* OverlyLongTongue: The hybrids have one of these, culminating in a gory example of InOneEarOutTheOther in ''The Awakening''.
* StatuesqueStunner: Part of why Natasha Henstridge was cast involved her 5' 9½" (1,77 m) frame making her more alien-esque. Sunny Mabrey and Helena Mattsson, both 5' 8" (1,73 m), also fit.
* VoluntaryShapeshifting: Possibly, it's hard to tell if switching from human-form to xeno-form is anything more than an instinctive reaction to threats.

* AbsurdlySpaciousSewer / BuildingOfAdventure: Inexplicably linked are a ritzy hotel, an elaborate scaffolded sewer network, and some kind of... oil well catacomb.
* AnkleDrag: Perhaps as an homage to ''Film/{{Aliens}}'', Sil grabs Laura's ankle at the end before being tossed back into the fire pit.
* AmbiguouslyEvil: It's left unclear if Sil's killing ways are a consequence of being brought up in a laboratory without knowledge of morals or a built-in trait of her genome. The alien civilization that enabled her creation in Earth also counts as ambiguous in their intentions (see Neglectful Precursors below).
* AntiVillain: Sil is a surprisingly sympathetic antagonist. She clearly has human-like emotions, including to some extent a desire to be loved ("she liked him"), and if you look at things from her perspective she's basically a young child completely alone on a world full of hostile StarfishAliens. She's a genetic freak tormented by dreams of a world and people she doesn't know, and over the course of the film seems to realise that she will never fit in anywhere. Yes, she's a killer, but she seems to be acting more out of instinct than conscious malice, from her point of view she's just defending herself or preserving her {{Masquerade}} which she absolutely has to maintain among [[HumansAreCthulhu the hostile Starfish aliens that surround her]]. And her goal of having children and propagating her own species are hardly in and of themselves evil. Plus if she had anything like the feelings toward her offspring that a human mother would you can't help cringing a little imagining her [[spoiler: witnessing the heroes incinerating her infant son with a flamethrower]] at the end. You can see how she's a threat to people that needs to be contained or neutralized, but at the same time you can sympathize with her.
* BarrierBustingBlow: Sil punches through a bathroom stall to rip out a woman's spine.
* BlankSlate: Sil was raised in a lab, so she starts with little concept of money and no moral compunction against killing. However, she is intelligent and cunning, so she's able to adapt pretty quickly. The killing thing stays, though.
* CampingACrapper: Sil kills the woman in the club by busting through the back wall of the toilet stall and ripping out her spine.
* CaptainObvious: Dan's psychic sensitivity rarely outstrips basic common sense and observation skills:
** Dan to Fitch at the boardroom: "She didn't like it when you locked her up".
** When they find the dead train conductor by the alien cocoon: "Something bad happened here". Preston actually lampshades the uselessness of this observation with a "No shit".
** They find Sil's car in the middle of the road without gas: "She walked... she walked".
** While Laura and Press flirt at the bar: "They like each other".
* CardboardPrison: The containment facility holding Sil has a security level that barely beats a pinfold, as it seems that everything she has to do in order to escape is running her way through a fragile glass pod, a guardless building, some unwary soldiers and a fence.
* CatScare: A squirrel jumps on Laura's shoulder for a false scare. Also the two bums behind the dumpster who give Dan a good scare.
* ChekhovsBoomerang: The hair dye commercial that gives Sil the idea to change her hair colour after [[spoiler: faking her death comes on TV again when Dan is watching and helps him realise she is still alive]].
* ChildrenAreInnocent: Why the train conductor cuts Sil a break. She doesn't even ask her name or where she's going to. Doubles as TheGuardsMustBeCrazy.
* ConvectionSchmonvection: In the finale when the tar-filled pit catches fire, the temperature in the cavern should have been unbearable. However, the characters don't respond to this fact.
* CruelAndUnusualDeath: Sil kills a train operator with a strangling arm out of her cocoon, a woman in a club by ripping her spine, and her first prospect by making her prehensile tongue go through his head (though the latter only happens when she changes her mind about him but he won't take no for an answer).
* CuriosityKilledTheCast: The female train conductors who approaches the odd looking alien life-forms with not a trace of fear on her face.
* DamselInDistress: During the finale, Laura falls into the tar pitch and has to be rescued by the other characters.
* DeathBySex: [[spoiler: Stephen Arden gets killed after having sexual intercourse with Sil.]]
* DyeOrDie: Sil colors her hair black and cuts it short late in the movie [[spoiler: after faking her death, see the next two entries]] to hide from the researchers hunting her. Only Dan had some idea to see through that, [[spoiler: after he somehow watched the same hair dye commercial on the TV that Sil watched.]]
* TheEmpath: Dan Smithson is an empath, although he's played up as more of a CaptainObvious.
* EnhanceButton: They get a blurry still from a video camera and manage to enhance the image, if only slightly.
* EscapedFromTheLab: Sil escapes from a government laboratory after the scientists who created her try to kill her.
* EveryCarIsAPinto: Invoked by Sil when she fakes her own death.
* FakingTheDead: Sil pulls off a complex one. With a [[spoiler: car, lots of gasoline, and a live victim.]]
* {{Fingore}}: The scene where Sil cuts her own thumb off (it regenerates) [[GoryDiscretionShot before moving onto to her female captive's hand]].
* {{Foreshadowing}}: The motel manager mentions to Sil that she doesn't want her credit card (which she took, along with the clothes, from the train conductor) to fall into wrong hands. Next scene has Fitch telling on the phone that they found her via tracing her credit card.
* GlassyPrison: The young Sil is held inside a confinement area with glass walls. When the project director decides to kill her with poison gas, she [[SoftGlass breaks through the glass]] and [[EscapedFromTheLab escapes the laboratory]].
%%* HeKnowsTooMuch
* HealingFactor: At the hospital Sil's back injuries from the car accident heal in seconds, leaving the onlooking doctor speechless.
* HotScientist: Marg Helgenberger, from this film and the second.
* HumanoidAbomination: Sil's son. Despite being theoretically only 1/4 alien, his alien form is significantly more monstruous than Sil's, featuring hinged legs, a crown-like head, an exposed abdomen, an asymmetric pair of arms and a noticeably malformed mouth.
* InescapableHorror: At the very end, after Sil is destroyed we see a rat chewing on a piece of her body. The rat mutates, indicating that it will become another Sil. Interestingly, also a case of a SequelHook that went entirely unused ([[WhatHappenedToTheMouse this particular rat is never mentioned in any of the following films]]).
* InformedAbility:
** Everyone on the team is supposedly intelligent, yet most of their lines are shouting out the obvious. Dan's line "something bad happened here" and Preston's line "she must have come through here" [[CaptainObvious were both said after finding a dead body]].
** Stephen Arden is supposedly an uber-smart person, yet after a horny, attractive female alien in human form [[spoiler: 'dies' in questionable circumstances, he doesn't think twice about sleeping with a horny attractive woman that suddenly appears before him. To be fair he probably didn't know she had the ability to regrow her thumb, and [[SomethingElseAlsoRises perhaps some blood left his head and went elsewhere]].]]
** Preston Lennox is supposedly a talented and sought-after mercenary, yet for most of the film he just stands around looking tough or wielding a gun.
** Dan's empathic powers are limited by the needs of the script. At one point his sensing of Sil is foiled by a wooden fence behind which Sil hides. Also he fails to sense those two bums behind the dumpster who give him a CatScare.
** Xavier Fitch is the top dog, yet his only skill seems to be being a {{Jerkass}}.
* {{Jerkass}}: Fitch. Particularly halfway through the lab scene citing quarantine protocol (like [[Franchise/{{Alien}} Ripley]], but unsuccessful) and the [[spoiler: sewer confrontation towards Dan.]]
* JerkassHasAPoint: In the sewer chase, although he was being a complete {{Jerkass}} about it, Fitch ''was'' correct that Dan was just guessing due to pressure and therefore leading everyone in the wrong direction.
* KarmicDeath: [[spoiler: Fitch]] in the first film, given how he had instigated the events to start with.
* KickTheDog: Sil cutting off the fingers of her captive. The victim would have very likely tried to explain that she couldn't regenerate like Sil could, and after the first finger, that would have been evident. Didn't deter Sil from continuing, though.
* KillItWithFire: [[spoiler: How Sil's son dies. Sil [[NotQuiteDead almost]] goes the same.]]
* KindheartedCatLover: Preston is introduced thanking a next-door neighbour for minding his cat while he's out of town.
* KissOfDeath: Sil kills someone while kissing him by sticking her tongue out through the back of his head.
* LectureAsExposition: Fitch gives a lengthily exposition of the SETI project and the failed DNA experiment to the summoned group in his boardroom.
* LetsSplitUpGang: Fitch orders the group to split up when they are down at the AbsurdlySpaciousSewer.
* MistakenFromBehind: Preston believes he spotted Sil at a bar, but when he approaches the blonde girl and she turns around, it is somebody else completely. Watch the scene [[https://youtu.be/y6Om0b0pttM here]].
* MyGodWhatHaveIDone: [[spoiler: Stephen Arden's look on his face and what he's thinking when he realized he have just been used as an UnwittingPawn for Sil to get her impregnated.]]
* NeglectfulPrecursors: It's not clear what the aliens wanted humans to do with their DNA, but either way giving it (and instructions on how to combine it with ours) was at best poorly thought out, if not downright malicious. The film seems to indicate that it was actually a malicious plan (one of the characters speculates that Sil is an ideal biological weapon if some alien race decided that humanity was a weed in need of plucking), while the role-playing game supplement suggests the aliens thought it was [[ForScience really interesting]] (and more than [[ItAmusedMe a little amusing]]) watching humans blunder around with biotech beyond their understanding and seeing how we responded to it.
* NightmareSequence: Young Sil has at least two, involving fully grown versions of herself and a male equivalent, and herself pursued by a [[http://www.hrgiger.com/ghost.htm "ghost train"]].
* OhCrap: [[spoiler: Stephen Arden]] says something along the lines of this when [[spoiler: he found out he was having sex with Sil. Right before she claws him to death.]]
* OneSizeFitsAll: Sil steals clothes from a female train conductor to blend in, yet somehow the overweight, middle-aged woman's clothes fit perfectly on Natasha Henstridge's model body.
* PlotDrivenBreakdown: When they try to breed the second embryo, the camera at the lab breaks down. The repair leads to an action scene.
* PreMortemOneLiner: Preston at the end: "Let go, you motherfucker." Cue an [[spoiler: [[BoomHeadshot M203-launched grenade into Sil's face.]]]]
* RaceAgainstTheClock: Fitch sets a 2 min countdown for the decontamination of the lab when the experiment on the second embryo gets out of hand with Preston and Laura TrappedInContainment.
* ReadingLips: In the scene where Fitch says "Tomorrow Night We'll go back to the Club", Sil is in a car down the street lip reading him. She'd [[ChekhovsSkill learned to do that]] in her GlassyPrison at his lab.
* RightThroughHisPants: Defied. When the group discovers Sil's first male victim as an adult, Fitch has an OhCrap moment as he believes she's successfully mated. Preston is quick to point out "Doesn't look like a successful mating to me. He's still got his pants on."
* ScreamingBirth: At the end Sil screams giving birth to her son (it's almost a ChestBurster, though coming out of the stomach). Apparently, even alien anatomy is not suited for painless child birth.
* SequelHook: The first movie ends with a rat eating Sil's remains, and using a tongue similar to hers. The following one somehow ignored it.
* ShapeShifter: Sil can choose between Natasha Henstridge's blond gorgeousness and her alien heritage's tentacled, scaled succubus.
* ShoutOut: Sil evading capture at L.A. train station by disguising as a train conductor is lifted from a scene in ''Film/NorthByNorthwest''. See comparison [[https://vimeo.com/152750722#t=6m51s here]].
* SingleTear: Fitch sheds a single tear in the beginning while overlooking the gassing of Sil.
* SoftGlass: Young Sil breaks the thick glass wall of her GlassyPrison at the lab with her bare fist.
* SternChase: After having escaped from the lab, Sil remains in constant pursuit by Fitch and his group.
* SuperStrongChild: Young Sil displays her super-human strength when breaking the glass of her lab prison and later when she breaks the drawer at the train's dining car with ease.
* SwissCheeseSecurity: There's practically no resistance to Sil's escape. She runs straight out an exit door and right off the premises. The only things between her and freedom were the glass of her containment cell and a chain-link fence.
* ThreeMonthOldNewborn: Justified. Due to his sped-up growth rate, Sil's son is already past baby age shortly after emerging from her womb.
* TragicMonster: Sil. For the most part she doesn't seem to be acting out of deliberate malice, rather self-preservation and natural instinct. That said, her natural instincts lead her to brutally murder a "rival" female.
* TrainEscape: Young Sil escape her pursuers by jumping on a passing train.
* TrappedInContainment: They're tooling around with the alien DNA when a camera breaks down in the sealed experiment chamber. Dr. Laura Baker and Preston volunteer to go in and try to replace the camera. Of course an accident happens and they are on their own to fight off the fast growing alien while the other team members are forced to watch from behind safety glass.
* TwoPersonPoolParty: Sil ends up in a hot tub with the guy who she was falling for. Unfortunately, the strike force arrives before anything can happen and Sil is reluctantly forced to kill the guy.
* VillainProtagonist: Everything that occurs is because of Fitch's messing around with alien DNA, to say nothing of his incredibly jerkass attitude, which [[spoiler: almost gets Preston and Laura killed.]]
* WhatHappenedToTheMouse: A more literal example than usual, the infected rat from TheStinger is an unused SequelHook.
* WoundedGazelleGambit: Sil is able to avoid capture [[spoiler: and ultimately fake her own death]] by approaching a woman fully nude and pretending to be a rape victim.
* YouHaveOutlivedYourUsefulness: [[spoiler: After Arden has sex with Sil to accomplish her goal of getting impregnated, Sil offs him when he starts to realize who she really is and what he has done.]]

[[folder:Species III]]
* AllMenArePerverts: Abbott believes the trope is in full effect with Dean towards Sara, but he's shown to care for her in a non-sexual manner.
* BittersweetEnding: [[spoiler:The world is finally free from the hybrid menace and Sara has a partner to live with in the wild. As he's sterile, they will be the last of their species. However, Dean states they will eventually find out, implying they might return to kill him in revenge.]] Not to mention that, [[spoiler:in keeping with the species' habit of exceeding their creators' expectations, it is not unlikely that Sara will somehow be able to naturally heal her own sterility.]]
* ClotheslineStealing: How Sara finds her first outfit. It doesn't explain how she gets her shoes, though.
* ContinuitySnarl: Abbott explains the infected astronaut's half-human children had defective immune systems due to being hybrids, and they are also implied to be sterile (the female one certainly seemed to be). This means the premise of the original movie, that Sil's offspring would end up replacing humanity, was never possible in the first place. Although, then again, the way the scientists in the lab produced their embryos and the natural conception by Ross may be the devil in the details here. It may also be relevant that Sil provided the egg in her breeding, whereas the halfbreeds in Species II & III all came from alien sperm. In crossbreeding species, eggs tend to have a greater influence over which traits the offspring will inherit, meaning Sil's halfbreed children would've been naturally more inclined to possess the aliens' strength then Patrick's halfbreeds.
* CrazyPrepared: Abbott as a lab equipped with hydrochloric gas, just in case he has to trap and kill a dangerous alien.
* CreepyChild: Little Sara rejects coldly Abbott's attempts to educate her in human customs, though we get a look of her softer side when she goes to bed and asks him uncertainly if she's really an unique being.
* DefrostingIceQueen: Sara through the film, though very subtly, and ultimately by [[spoiler:saving Dean from Amelia.]]
* DirtyOldMan: Abbott's superior Dr. Turner is initially polite enough not to stare at a naked Sara, but after becoming delighted by her reproductive advances on him, he tries to rape her when she changes her mind at sensing he hasn't the right DNA.
* FullFrontalAssault: Sara ends up fighting Amelia with no more covering than her alien form scales.
* InnocentFanserviceGirl: Sara is initially ignorant about the human considerations towards nudity, which leads her to show herself naked in front of Dr. Turner, which in turns leads to the old bastard's death.
* MeaningfulName: The previously unnamed military project that created Sil is now named Project Athena. Just like Athena, Sara is adept at both learning and fighting.
* ParentalSubstitute: Abbot is fond of Sara as a surrogate daughter, or so he tells her in her child stage, although he also has the interest to use her cells to win a Nobel Prize.
* PsychicPowers: Both Sara and Amelia, something that had only been hinted at previous installments.
* {{Psychometry}}: Sara learns all the contents of a chess manual by merely touching it.
* TheQuietOne: Both as a child and as a young woman, Sara talks little and only when needed.
* TheStoic: Sara barely emotes through the film, causing some humor when an older, female UFO expert believes she's a college student with a nasty recent breakup.

[[folder:Species: The Awakening]]
* CameBackWrong: With Miranda dying, her creator Tom tries to save her and seemingly succeeds in rejuvenating her, though at the cost of another human life. It soon becomes apparent that the once sweet Miranda is now almost completely gone, her once dormant and contained [[SuperpoweredEvilSide alien side]] having [[SplitPersonalityTakeover taken over]].
* EyeScream: A doctor gets [[ConspicuousCG Miranda's tongue]] through the back of her head and out the eye.
* SouthOfTheBorder: For most of the film.